at cms the library subscrbes to anumber of mission journals. increasingly these are online and some you have to be a member or subscribe to access but others are free. i mentioned anvil's re-invention recently online and free.
well another journbal that is online and free is the international belletin of missionary research. the latest issue which you can download is on mission and creation care possibly one of the most important edges in mission as we head into the next few decades. loads of back issues are available. if i am being penickety i found it awkward to find out what issues might be interesting as the titles of the issues online are the dates of publication rather than the themes. but having said that there is a search facility on the site. there's a wealth of mission thinking and research here - have a dig and see what you find.